40807980 has 72 divisors (see below), whose sum is σ = 129179232. Its totient is φ = 10407936.

The previous prime is 40807979. The next prime is 40808063. The reversal of 40807980 is 8970804.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 789 + ... + 9068.

It is an arithmetic number, because the mean of its divisors is an integer number (1794156).

Almost surely, 2^40807980 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40807980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64589616).

40807980 is an abundant number, since it is smaller than the sum of its proper divisors (88371252).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40807980 is a wasteful number, since it uses less digits than its factorization.

40807980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9895 (or 9890 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 40807980 is about 6388.1123972579. The cubic root of 40807980 is about 344.2825670922.

The spelling of 40807980 in words is "forty million, eight hundred seven thousand, nine hundred eighty".